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NP203 Gear Ratio Change?
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Mad Dog
Nov 12, 2002, 10:44:26 AM11/12/02
to
First let me say hello to Doc and Gary, (it's been a while).
The overall gearing in my 79 Scottsdale is very low (high
numerically) which makes for very poor mileage at highway
speeds because of high engine speeds at a given rpm.
Is it possible to change the gear ratio in the transfer case
with a lower numerically set that would decrease engine rpm
at a given speed .
I want taller gearing but i dont want to change the ring and
pinion in both axles, am i dreaming here or is it possible to
perform such a operation?
If so who would i contact to acquire this gearset for the NP203?
TIA, George
P.S. I'm back on the road again driving a 99 Kenworth T2000
pulling a 53' reefer around the 48 states plus Canada, what a sweet
ride the KW is, C12 Caterpillar w/a Super 10 tranny ridin & guidin...
Take care
The overall gearing in my 79 Scottsdale is very low (high
numerically) which makes for very poor mileage at highway
speeds because of high engine speeds at a given rpm.
Is it possible to change the gear ratio in the transfer case
with a lower numerically set that would decrease engine rpm
at a given speed .
I want taller gearing but i dont want to change the ring and
pinion in both axles, am i dreaming here or is it possible to
perform such a operation?
If so who would i contact to acquire this gearset for the NP203?
TIA, George
P.S. I'm back on the road again driving a 99 Kenworth T2000
pulling a 53' reefer around the 48 states plus Canada, what a sweet
ride the KW is, C12 Caterpillar w/a Super 10 tranny ridin & guidin...
Take care
--
Mad Dog
Dean Dardwin
Nov 12, 2002, 2:37:02 PM11/12/02
to
Mad Dog,
Several places make UD NP203s but I've never heard of an OD unit. Maybe
someone else knows of one.
You can change the R&Ps, add a www.gearvendors.com gear splitter (UD/OD)
unit, or swap to larger tires. An OD AT is another option; the OD on a
4L80E is .75, just like swapping 4.10s for 3.08s!
Dean
Gary Glaenzer
Nov 12, 2002, 5:48:29 PM11/12/02
to
no
the 203 is 1:1 in high, there is no room to put another gearset as you
desire
"Mad Dog" <lgs...@strato.net> wrote in message
news:aqr7dq$cnovi$1...@ID-71746.news.dfncis.de...
Luke
Nov 13, 2002, 4:37:22 AM11/13/02
to
If it's an auto, how about using a 700-R4 for the benifit of having O.D. Or
wouldn't the cheapest way be to gear up the diffs.
wouldn't the cheapest way be to gear up the diffs.
"Mad Dog" <lgs...@strato.net> wrote in message
news:aqr7dq$cnovi$1...@ID-71746.news.dfncis.de...
Mad Dog
Nov 13, 2002, 7:21:20 AM11/13/02
to
Okay, the 4L80E and 700R4 are out of the question since i just
put this TH350 together for $600.
Gear Vendors makes the overdrive unit (thanx Dean) for $2600
that replaces the back cover of the transfer case (pretty slick unit).
I just installed a set of BF Goodrich 32x10.50-15 A/T's on the stock wheels
and that helped a little, i'm gonna see if i cant shorten the life
of the stock diffs. then i can justify swapping R&P's.
I purpose built the truck for off-road so i better learn to live
with it (i'm gonna reap what i sowed).
Thanx Dean,Gary and Luke for all your help
put this TH350 together for $600.
Gear Vendors makes the overdrive unit (thanx Dean) for $2600
that replaces the back cover of the transfer case (pretty slick unit).
I just installed a set of BF Goodrich 32x10.50-15 A/T's on the stock wheels
and that helped a little, i'm gonna see if i cant shorten the life
of the stock diffs. then i can justify swapping R&P's.
I purpose built the truck for off-road so i better learn to live
with it (i'm gonna reap what i sowed).
Thanx Dean,Gary and Luke for all your help
--
Mad Dog
"Luke" <Luk...@shaw.ca> wrote in message
news:m3pA9.813075$Ag2.27...@news2.calgary.shaw.ca...
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